As you can see, the use of this registry key (set to 0) mades more files moved in the spacehog area.

Considering the global system performances, I will set this registry key to 1 even there is more files in the zone 2.

Regards, Laurent

Well when you have it enabled, last access timestamp is disabled so JKD AFAIK ignores the 'Files not accessed in 30 days' spacehog. If timestamps have been disabled for a while nearly all files will have an old timestamp so when you turn timestamps back on JKD will see loads of files as not having been accessed for a while and move them to spacehogs.

I recently set this value to "0" and found that disk activity decreased slightly when accessing lots of files.

Microsoft's description:

Quote

Because updating the last-accessed timestamp requires writing data to the disk, an activity that accesses many files might be faster if this type of update is disabled. However, some applications may require that files have an accurate last-accessed timestamp.

Vista has this option turned off by default btw, I use XP but to me it looks like everything points to disabling the timestamps.

For JkDefrag... see the note from Microsoft. I can't quite tell yet if there is any real difference in defragging.